The lnstat command is a Linux utility that displays the network status of Linux systems. It shows the current status of various network connections, including TCP, UDP, and UNIX sockets. The lnstat command is useful for monitoring network traffic and identifying any issues with network connections.
Overview
The syntax for the lnstat command is as follows:
lnstat [options]
When executed without any options, the lnstat command displays a summary of the network statistics since the system was last booted. The output includes the total number of packets received and transmitted, as well as the number of errors and dropped packets.
The lnstat command can also display detailed information about specific network connections. To do this, you need to specify the protocol and the port number. For example, to display information about all TCP connections on port 80, you would use the following command:
lnstat -t -p 80
This command displays a list of all TCP connections on port 80, including the local and remote IP addresses, the state of the connection, and the number of packets sent and received.
Options
The following table lists the available options for the lnstat command:
| Option | Description |
|---|---|
| -a | Displays information about all network connections. |
| -t | Displays information about TCP connections. |
| -u | Displays information about UDP connections. |
| -x | Displays information about UNIX socket connections. |
| -p | Specifies the port number to filter the output. |
| -e | Displays extended information about network connections. |
| -h | Displays help information. |
Troubleshooting tips
- If the
lnstatcommand does not display any output, it may be because there are no active network connections. Try specifying a protocol and port number to filter the output. - If you are not seeing the expected output, check that you are using the correct options and syntax for the
lnstatcommand. - If you are experiencing issues with network connections, use the
lnstatcommand to identify any errors or dropped packets. This can help you diagnose and resolve the issue.
Notes
- The
lnstatcommand requires root privileges to run. - The output of the
lnstatcommand can be quite lengthy, especially when displaying detailed information about all network connections. Consider piping the output to a file or using thelesscommand to view it page by page.